Paper.



PATENTED APR. 24, 190E J. A. WILKINSON.

PAPER.

APPLICATION FILED JULY27, 1905.

Z V/ INVENTOR I .w BY. v

g ATTORNEYS JOHN A. WILKINSON, OF SHELTON, CONNECTICUT.

Specification of Letters Patent.

. ."Patented. April 24, 1906.

Appli tion an July 27,1905. Serial No. 271,420.

1'0 (1.7] Hill/0772, It may concern.-

Be it known that 1, JOHN A. WILKINSON, a citizen of the United States of America, and a resident of Shelton, county of Fairfield, State of Connecticut, have invented certain new and useful Improvements in Paper, of which the following is a specification, reference being had to the accompanyingdrawings, forming a part thereof.

My invention relates to improvements in paper; and it consists in a new article of man ufacture, comprising paper, whose opposite surfaces are vesieated by numerous minute oblong blisters disposed in substantial parallelism.

The opposite surfaces of the paper are sub-I stantially alike, but are in no sense complementar to each other, as in the form of corrugater *paper. Paper thus vesicate'd incloses between its upper and lower surfaces innumerable minute air cells or pockets, whereby the pa er becomes soft, flexible, and light for its iiulk. Furthermore, it is exceedingly strong, because it will uniformly resist a bursting strain and has a very pleasing appearance.

The material from which my improved paper is formed is preferably rope, tl1e plain paper from which my paper may be produced icing known as rope paper. To produce my paper, ordinary rope paper may be taken and the upper and lower surfaces suitably vcsicated in any desired manncrf This vesication may be'produccd by progressively folding the paper first in one direction and then in the other. This may be done byhand or by suitable machirery provided for the purpose. The cll'ect of folding the paper progressively is to produce oblong minute blisl'crs, which blisters run longitudinal of the fold and trarsverseof the al h of progression. 'll ese blisters are formed by the unequal tension upon lllO paper at opposite sides thereof llicroll as it is being folded back and forth upon itself, the fibers of the paper being partially severed, and in this way air-pockets or aircells are formed. in appearance this paper closely resembles one side of a ccrta in class of paper known as crfnpwpaper. "lhc surface of crepe-paper is produced during t he process of manufacture of the goods, the material being renlovcd from a roll while in a wet condition by a knife or doctor set at the proper angle. Finch paper has clustered projections upon one side -1. (q. open lhesidc away from nlnlconthr idc nest tollicroll it has in addition to these clustered projections a plurality of larger projections at intervals. The physical differences between my paper and such paper, however, are marked in that a cross-section of the crepe-paper showsthat the projections are formed of solid material or portions of the material having a uniform densit In other words, the pro ections are not b isters, and the material has no air pockets or cells. A given quantity of this crepe-paper of the same average thickness as my paper weighs considerablymore than does the paper of my invention herein.

Another form of paper, also sometimes called crepe-paper, but which is in reality a crimped paper, is formed by crimping or wrinkling the paper. .The opposite sides of paper of this description are complementary to each other, pist as is any material of corrugated or'crimped form.

In the sheet of drawings forming a part of this specification I have endeavored to illustrate in somewhat diagrammatic form paper embodying my invention; but it must be understood that these illustrations are more or less diagrammatic and arbitrary, for the reason that it is the general characteristics only of various pieces of the paper which are alike, no two pieces being ever exactly similar.

Figures 1' and 2 show front and rear views of a piece of paper embodying my invention, the two views illustrating the similarity be tween the front and rear surfaces and the characteristic uniformity of the vesication. Fig. 3 is a. cross-sectiomil view, much enlarged and exaggerated, thesection taken transverse of the blisters and illustrating, first, that while the front and rear sides of the paper are substantially alike, they are not comlementary the one to the other, as in crinfiled or corrugated. paper, and, second, the

air cells or pockets caused by the partial severing of the fibers by which the vesication is produced. Fig. 4 is a view in similar crosssection and upon the same scale as Fig. 3, of a sheet with plane surfaces from which the article shown in the other figure has been pro duccd.

A represents the front of the paper, and ii the rear 1 hereof.

(l C (.3 designates the blisters, which it will be seen run in a general direction from side to side of the sheet and of which there are a large number disposed in substantial parah lclisni. The air cells or pochcls i) appear in the cross-scl-tion, Fig. 3;. in Fig. 4 is shown a view in cross-section of a paper before it has partially severed,so as to formthe air-pockets lower D and blisters C without impairing the strength of the sheet, as a whole. In fact, I have found by actual tests that the sheet in its final com'lition. is actually stronger than before, this being due to the fact that the paper after treatment has a greater flexibility than before and while substantially inelastic will yield suflicientl y to spread the resistance to a strain over a greater surface. It will also be seen that the average thickness of the new product is greater than the averagethickness ofthe plain sheet from which the same is produced, although the amount of material remains the same.

I What I claim is- I 1. As a new article of manufacture a web or sheet of paper having blistered upper and lower surfaces, the blisters comprising air cells or pockets between the said upper and urfaces.-

's a new article of manufacture, a web or sheet of rope paper having blistered upper and lower surfaces, the blisters comprising air cells or pockets between the said upper l and lower surfaces.

3. As a new article of manufacture a web or sheet of re e paper having vesicated surfaces pI oducer by blistering a plane sheet the blisters comprising air cells or pockets between the upper and lower surfaces f JOHN A. WILKINSON. Witnesses:

CnAs. D. STAINTON, EDWARD L. WHITE. 

